feat: add Zenith Hosting to hosting options on the website (#3142)

Author: odpay

docs/site/layouts/index.html

@@ -89,6 +89,7 @@ <h2 class="center">Hosting providers</h2><br />
       <a href="https://www.kloudbean.com/listmonk-self-hosted"><img src="static/images/host-kloudbean.svg" alt="One-click deploy on Kloudbean" style="max-height: 32px;" /></a>
       <a href="https://northflank.com/stacks/deploy-listmonk"><img src="static/images/host-northflank.webp" alt="One-click deploy on Northflank" style="height: 32px; width: 150px; border-radius: 6px; object-fit: contain;" /></a>
       <a href="https://railway.app/new/template/listmonk"><img src="static/images/host-railway.svg" alt="One-click deploy on Railway" style="max-height: 32px;" /></a>
+      <a href="https://zenith.hosting/host/listmonk"><img src="static/images/host-zenith.svg" alt="Deploy with Zenith" style="max-height: 32px;" /></a>
       <a href="https://www.pikapods.com/pods?run=listmonk"><img src="static/images/host-pikapods.svg" alt="Deploy on PikaPod" /></a>
       <a href="https://elest.io/open-source/listmonk"><img height="33" src="static/images/host-elestio.webp" alt="Deploy on Elestio" /></a>
       <a href="https://zeabur.com/templates/5EDMN6"><img width="148" src="static/images/host-zeabur.svg" alt="Deploy on Zeabur"/></a>